An obtuse angle is an angle more than 90 degrees but an acute angle is an angle less than 90 degrees.
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No, an obtuse triangles has one obtuse angle and two acute angles. If a triangle has an obtuse angle, it is considered obtuse and cannot be acute.
An obtuse angle has no complementary angle.
115 degrees is an obtuse angle
Acute
It is an obtuse triangle having 1 obtuse angle and 2 different acute angles Or it is an isosceles triangle having 1 obtuse angle and 2 equal acute angles